A few test optimizations; using native unittest where no Django-specific TestCase features are required.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@13935 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/regressiontests/utils/feedgenerator.py

@@ -1,9 +1,9 @@
 import datetime
-from unittest import TestCase
+import unittest
 
 from django.utils import feedgenerator, tzinfo
 
-class FeedgeneratorTest(TestCase):
+class FeedgeneratorTest(unittest.TestCase):
     """
     Tests for the low-level syndication feed framework.
     """